The present study attempts to estimate the shadow price of unextracted groundwater in the Vozvozi aquifer. In the context of this study, we model the production function of vertically integrated agricultural firms in terms of an input-oriented distance function with multiple inputs. Duality...

The necessity of market-based decisions is a key factor for the development of the railway transport. The main aim of this paper is to study the infrastructure charging regime and cost allocation methodology, currently, in use in Bulgaria in order to reveal the level of implementation of the...